P26_005 - 5. (a) The capacitance of a parallel-plate...

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5. (a) The capacitance of a parallel-plate capacitor is given by C = ε 0 A/d ,where A is the area of each plate and d is the plate separation. Since the plates are circular, the plate area is A = πR 2 ,where R is the radius of a plate. Thus, C = ε 0 πR 2 d = (8 . 85 × 10 12 F / m) π (8 . 2 × 10 2 m) 2 1 . 3 × 10
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